Thermochemical stability and nonstoichiometry of yttria-stabilized bismuth oxide solid solutions

H. Kruidhof, K.J. de Vries, A.J. Burggraaf

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Abstract

The thermochemical stability of fast oxygen ion conducting yttria stabilized bismuthoxide (YSB) solid solutions containing 22.0–32.5 mol% of yttria was investigated. It was shown that in the temperature range between 650–740 C the stabilized cubic δ-phase containing less than 31.8 mol% of yttria is not stable during long term annealing treatments (greater-or-equal, slanted 500 hours). During annealing at 650 C a sluggish transformation from the cubic to hexagonal phase appears, while above 740 C this hexagonal phase is converted very fast into the cubic phase again. It was shown, that the oxygen content of YSB solid solutions is a function of temperature and oxygen partial pressure
Original languageEnglish
Pages (from-to)213-215
JournalSolid state ionics
Volume37
Issue number2-3
DOIs
Publication statusPublished - 1990

Keywords

  • IR-61546

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